ICT
Grace Valley Indian School
Lesson 2:
Grade 7
Number System
Write the correct one-word answer.
1.
Computers recognize only two discrete states, ie., ……………………………
a. Yes & No
2.
b. 1 & 2
b. Off
b. Binary
b. 0 and 1
b. Bit
b. Data
b. Octet
c. Nibble
d. KB
c. Byte
c. Character
c. Bit
d. Byte
c. Octal
d. Hexadecimal
b. Decimal
c. Binary
d. Hexadecimal
b. 1010
c. A10
d. 1001
b. 11
c. 10
d. 15
………………… is the greatest digit of decimal number system.
a. F
15.
c. 0 to 7
………………… hexadecimal number system A is equal to …………………
a. 100
14.
d. Decimal
The binary equivalent of the decimal number 10 is …………………
a. 1000
13.
c. Octal
………………… number system represents numeric values using two unique digits (0 & 1)
a. Octal
12.
d. Decimal
…………………………… number system is a base 10 number system we use every day.
a. Decimal b. Binary
11.
c. Octal
…………………………… is a group of four bits and technically termed as a half-byte.
a. Nibble
10.
b. Binary
A group of 8 bits is called a ……………………………
a. MB
9.
d. Nil
The smallest unit of information that a computer uses ……………………………
a. Byte
8.
c. None
The digits used in Octal number system are from ……………………………
a. 0 to 9
7.
d. True & False
The number system used internally by all modern computers is ……………………………
a. Hexadecimal
6.
c. A & B
The base 8 number system is ……………………………
a. Hexadecimal
5.
d. Zero & One
The digit ‘zero’ represents the electronic state ……………………………
a. On
4.
c. On & Off
The On and Off states are represented by ……………………………
a. 1 & 0
3.
b. Right & Wrong
b. 10
c. 9
d. 7
………………… is the highest single digit in hexadecimal number system
a. 9
b. F
c. Z
d. 1
ICT
Grace Valley Indian School
Grade 7
Fill in the blanks.
1.
In computers, characters have to be represented in the form of ……………………………
Ans.
Electronic Pulses
2.
In a Positional Number System, there are only a few symbols called ……………………………
Ans.
Digits
3.
The …………… Number System represents numeric values using two symbols, i.e., 0 & 1.
Ans.
Binary
4.
The Decimal Number System has …………………………… as its base.
Ans.
10
5.
The Octal Number System is the base …………………………… number System.
Ans.
8
6.
The Hexadecimal Number System includes the symbols …………… and ……………
Ans.
0 to 9 and A to F
Define the following.
1.
Bit:
The smallest unit of digital data in a computer is called Bit (Binary Digit). A Bit
can have a single binary value, either 0 or 1. Bit is the fundamental building
block of computer information.
2.
Byte:
A byte is a unit of data that is eight bits long. A byte is a unit most computers
use to represent a character such as a letter, a number, or a symbol.
3.
Nibble: A Nibble is a group of 4 bits, technically termed as a half-byte. It is the second
smallest unit for measuring the computer memory.
Differentiate the following.
1. Non-Positional Number System and Positional Number System:
The non-positional number system is a system in which each symbol always
represents the same value regardless of its position.
The positional number system is a system for the representation of numbers in
which the value of a number system depends on its position.